Asynchronous support has long been one of the most requested features in web3.py. The AsyncHTTPProvider was first introduced in v5.20.0, but has received polish in most releases since. There are a couple edge cases to go for full support, but the freshly released v6 is as good

[Last update: May 16, 2023] Welcome to Part 3 in the saga! Part 1 covered blockchain fundamentals. Part 2 continued on to examine Ethereum accounts and how they enable participation in the network. Part 3 will build on those concepts with the introduction of smart contracts. Smart contracts, an introduction

Our team enjoyed the first-ever PyChain virtual conference [https://www.pychain.org/]! As a part of the event, we gave a quick introduction to Web3.py, discussed the latest feature development, and provided a few insights into the upcoming roadmap. Re: roadmap, your priorities are our priorities. Besides opening issues

Is most of your runtime spent waiting on responses from remote nodes? Web3.py has an AsyncHTTPProvider [https://web3py.readthedocs.io/en/latest/providers.html#asynchttpprovider] available for use, but under active development. Not every feature, filter, and middleware is ready for use yet. This post is for those users

EIP-3668 [https://eips.ethereum.org/EIPS/eip-3668] introduced a standard for secure off-chain data lookups in Ethereum. This creates a broadly accepted pattern for a smart contract to return a location where off-chain data can be referenced. This post will give a quick tour of how that works, what a

If you're looking to make Web3.py do something outside of its native functionality, you've got at least a few options: middleware, custom methods, external modules, and custom providers. This post will walk through what each of those are, when you might reach for them, and how to get started.

Build custom functionality or import a third-party plugin into your Web3 instance.

A round trip from your command line to an Ethereum node and back as it travels through Web3.py.

There's a small set of use cases where you might need to decode a signed transaction which has not yet been included in a block. For example, MEV protocols work with bundles of signed transactions separate from the main transaction pool. If that series of words means nothing to you,

When writing smart contracts, you're encouraged to include human-readable error messages. In Solidity, these can be declared within require or revert statements [https://solidity-by-example.org/error/]. For example: function subtract(uint256 a, uint256 b) public pure returns (uint256) { require(b <= a, "(a) must be larger than (b)!"); uint256 c = a

Each new Ethereum address you create is a long jumbled string of letters and numbers preceded by 0x – until it's not! You may have seen some vanity addresses in wild, i.e., an Ethereum address that spells out a word or has many repeating characters. The way these are created

Ethereum's next network upgrade, dubbed London, is live on the Ropsten testnet, with other testnets soon to follow. A summary of the London updates can be found here [https://medium.com/ethereum-cat-herders/london-upgrade-overview-8eccb0041b41], and a timeline of the London rollout can be found here [https://blog.ethereum.org/2021/06/

As of version 5.19.0, Web3.py [https://github.com/ethereum/web3.py] includes one of Geth's lesser-known debugging features: the ability to override state when using the eth_call [https://web3py.readthedocs.io/en/stable/web3.eth.html#web3.eth.Eth.call] JSON-RPC method. What that means in

[Last update: May 16, 2023] Welcome back! In the first installment of this series we covered a lot of ground while interacting with a simulated Ethereum network. At this point, you should have at least a fuzzy idea of how to answer these questions: * What's a blockchain and what’s

Among a dozen other initiatives, the Ethereum 2.0 teams have been working to standardize how developers can interact with beacon nodes. This effort is ongoing, but the latest specification can be found here [https://ethereum.github.io/eth2.0-APIs]. We're excited to announce that Web3.py [https://web3py.readthedocs.

[Last update: May 16, 2023] So, you’ve heard about this Ethereum thing and are ready to venture down the rabbit hole? This post will quickly cover some blockchain basics, then get you interacting with a simulated Ethereum node – reading block data, checking account balances, and sending transactions. Along the